#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
int main()
{
   printf("testexec ....begin\n");

   pid_t id = fork();
   if(id == 0)
   {
     sleep(1);
     execl("/usr/bin/ls", "ls", "-l", "-a", NULL);
     exit(1);
   }
   int status = 0;
   pid_t rid = waitpid(id , &status , 0);
   if(rid > 0)
   {
     printf("father wait success , child exit code : %d\n", WEXITSTATUS(status));
   }
   printf("testexec ... end!\n");
   return 0;
}
